PHP如何实现简单日历类编写？本篇文章小编给大家分享一下PHP实现简单日历类编写代码，小编觉得挺不错的，现在分享给大家供大家参考，有需要的小伙伴们可以来看看。

代码如下：

calendar.class.php

year = isset($_GET['year'])?$_GET['year']:date("Y");
  $this->month = isset($_GET["month"])?$_GET["month"]:date("m");
  $this->first_week = date("w", mktime(0, 0 ,0, $this->month, 1, $this->year));
  $this->day = date("t", mktime(0, 0 ,0, $this->month, 1, $this->year));
 }
 function showCalendar() {
 //  echo $this->year."年".$this->month."月".$this->first_week."天".$this->day;
   echo ""; //用表格输出
   $this->chageDate("index.php"); //用于用户调整年月份
  $this->weekList();//显示星期
  $this->dayList(); //显示天数
  
  echo "";
 }
 //1、显示星期
 private function weekList() {
  $week = array("日","一","二","三","四","五","六");
  echo "";
   for ($i = 0; $i < count($week); $i++) {
   echo "".$week[$i]."";
  }
  echo "";
 }
 //2.显示天数
 private function dayList() {
  $color = "#2ca50c";
  echo "";
  for ($i = 0; $i < $this->first_week; $i++) { //输出空格，弥补当前月空缺部分
   echo " ";
  }
  for ($k = 1; $i <= $this->day; $k++) {
   $i++;
   if ($k == date("d")) echo "".$k.""; //是今天，加效果
   else echo "".$k."";
   if ($i % 7 == 0) {
   echo ""; //每7天一次换行
   if ($i % 2 == 0) $color = "#2ca50c";
   else $color = "#9ddb27"; //实现各行换色的效果
   }
  }
  while ($i % 7 != 0) { //将剩余的空格补完
   echo " ";
  $i++; 
  }
  echo "";
 }
  
 //3、用于用户调整天数
 private function chageDate($url="index.php") {
  echo "";
   echo "
".$this->year."年".$this->month."月
"; 
  echo "";
  echo "";
  echo "".""."<"."";
  echo "".""."<<"."";
  
  echo "";
   echo '';
    for ($year = 2038; $year >= 1970; $year--) {
    $selected = ($year == $this->year)?"selected":"";
    echo ''.$year.'';
    //echo ''.$year.'';
   }
   echo "";
   
  echo '';
  for($month=1;$month <= 12;$month++){
   $selected1 = ($month == $this->month) ? "selected" : "";
   echo ''.$month.'';
  }
  echo '';
  echo "";
  
  
  echo ""."".">>"."";
  echo ""."".">"."";
  echo "";
 }
 
 private function prevYear($year, $month) { //获取上一年的数据
  $year--;
  if ($year < 1970) $year = 1970;
  return "year={$year}&month={$month}";
 }
 private function prevMonth($year, $month) {
  if ($month == 1) {
   $year--;
  if ($year < 1970) $year = 1970;
  $month = 12;
  }else $month--; 
  return "year={$year}&month={$month}";
 }
 private function nextYear($year, $month) { //获取上一年的数据
  $year++;
  if ($year > 2038) $year = 2038;
  return "year={$year}&month={$month}";
 }
 private function nextMonth($year, $month) {
  if ($month == 12) {
   $year++;
  if ($year > 2038) $year = 2038;
  $month = 1;
  }else $month++; 
  return "year={$year}&month={$month}";
 }
 }

主页 index.php

 

 showCalendar();
 ?>